ACTIVE-MODE-LOCKING OPTICAL FIBRE PULSED LASER GENERATOR HAVING A VARIABLE INSTANTANEOUS FREQUENCY

摘要

A high-transmission-speed optical connection comprising apulse-generation laser source, optical-fibre transmission means and areceiver, in which said optical-fibre means forms an optical fibrepath, such that a pulsed signal of the soliton type is subjected to abroadening in time greater than 50% by effect of the chromaticdispersion, in which said laser source comprises an active andharmonic mode-locking optical-fibre laser wherein the fibre length,filter pass-band and power in the cavity are selected for emittingpulses of a Gaussian temporal profile having such a duration andbandwidth that, at the receiver, the duration of the pulses themselvesis not more than 15% higher than the duration at the emission.